Rock-drill.



J. MORROW.

ROCK DRILL.

{iPlLIGATION FILED NOV. 1B, 1913.

Z SEEETSSHEET 1.

Inventor Attorneys THE NORRIS PETERS CO;, PHOTUJ-ITHOU WASHINGTON D. C,

J. MORROW.

ROCK DRILL. APPLICATION FILED 11017.18, 1913 Patented Oct. 13, 1914.

Attorrteys THE NORRIS PETERS (0. PHOTO-LITHO.. WASHINGTON. Dv :7

UNITED STATES PATENT OFFICE.

, A JEREMIAH Moimow, or WELLSTON, OHIO.

ROCK-DRILL.

To all whom it may concern:

Be it known that I, JEREMIAH Monnow, a citizen of the United States,residing at Wellston, in the county of Jackson and State of Ohio, haveinvented a new and useful Rock-Drill, of which the following is aspecification. I j

The device forming the subject matter of this application is a structurewhich combines a rotary drill with a churn drill, the construction beingsuch that a drill hole may be put down with the churn drill to apredetermined depth, whereafter, the hole may be put down by a rotarymovement of the drill, both operations being carried out by I a singlemachine.

Another object of the invention is to provide novel means for effectinga quick release of a reciprocating drill, so that the drill will droppromptly, and with a minimum amount of lost motion, when released.

Another object of the invention isto provide novel means for imparting astep-bystep rotation to a reciprocating drill. I p

The invention aims further to provide novel mechanism for imparting areciprocation to the drill, the construction being such that the drillmay be reciprocated at a high rate of speed.

Another object of the invention is to provide novel mechanism forregulating the stroke of the drill as the drill reciprocates.

The invention contemplates novel means whereby, at the will of theoperator, a pair of eccentrics which serve to impart a re ciprocatingmovement to the drillmay be set as a continuous wheel, therebypermitting a string of tools to be raised out of the well.

With the above and other objects in view which will appear as thedescription proceeds, the invention resides in the combinationandarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment ofthe invention herein disclosed can be made within the scopeof what is claimed without departing from the spirit of the invention.

In the accompanying drawings :Figure 1 shows the invention in top plan;Fig. 2 is an end elevation; Fig. 3 is'a fragmental side Specification ofLetters I'atent.

Application filed November 18, 1913.

. Patented Oct. 13, 1914. Serial No. 801,662.

elevation; Fig. is a fragmental horizontal section, Fig.5 1s a plan ofone eccentric; Fig. 6 is an elevation showing a portion of thestep-by-step mechanism .whereby the drill is intermittently rotated;Fig.7 is a long tudinal sectional detail illustrating a portion of themeans whereby one section of the drill" rod may be separated, byrotation, from anothersection thereof. I v

In carrying out the invention there is provlded a supporting structure 1which may be of any desired form. Projecting from I the supportingstructure 1 are bearings 2 in which is journaled for rotation a driveshaft 3. This drive shaft 3 may be actuated in any suitable manner, butthe same in the present instance is shown as provided at one end with apulley 4 about which is trained a belt 5, the same engaging a pulley 6on a shaft 7 which may be taken to represent the shaft of an engine, amotor or a prime mover of any desired sort. Secured to the forward endof theshaft 3 is a pinion 8 meshing into a gear wheel 9 mounted upon astub shaft 10 journaled in bearings 11 on the support 1. By means of auniversal joint 12 the stub shaft 10 is connected with a shaft 14. journaled at its forward end in a bearing 15 mounted to reciprocate inguides 16 carried by the supporting structure 1. In the ordinaryoperation of the machine,

however, the bearing 15 does not recipro cate, but is held fiXedby anysuitable means, such as an adjustingscrew. 17 threaded into a lug 18 onthe supporting structure 1, the inner end of the adjusting screw 17being fixed for rotation but against longitudinal movement in thebearing 15, as indicated at 19. The shaft 14 is provided with rotarymeans for engaging one side of a drill to be described hereinafter, andthis rotary means preferably takes the form of a wheel 20 fixed to v theforward endof the shaft 14c. As an incidental feature of the structure,

and having no connectionwith the operation of the device, generallyconsidered, I

bearings 211are mounted upon the supporting structure 1 to one side ofthe shaft 14, the bearings 21 receiving a transverse shaft 22 carrying adrum 23 provided adjacent its periphery with a beveled gear 24engageable by a beveled pinion 25 splined upon the fixed to a stub shaft28 j ournaled in bearings 29 011 the supporting structure 1, the stubshaft 28 being connected by means of a universal joint 30 with a shaft31, corresponding to the shaft 1%, the shaft 31 being j ournaled in abearing 32 mounted to slide in guides 33 on the supporting structure 1.A retractile spring 3 1- is connected to the bearing 32 and is securedto a bracket 35 projecting from one side of the supporting structure 1.The forward end of the shaft 31 is equipped with a wheel 36,corresponding to the wheel 20, the wheels 36 and 20 being provided withyieldable peripheral facings 37. p c

Mounted on the shaft 31 is a pair of cams 38 having shoulders 39. One ofthe cams 38 is fixed to the shaft 31, the other cam being adjustable,circumferentially, upon the shaft. The cams 38 are connected by anysuitable means for preventing relative rotation between them, and withthis end in view, one cam is provided with a slot 10 receiving a screwand wing nut 41 on the other cam. The cams are adapted to cooperate withan abutment, the same comprising a roller 12 journaled on a yoke 43mounted to slide in a guide 1 for adjustment. In order to hold the yoke43 in adjusted positions, a screw 46 is held against longitudinalmovement but forrotation in a post 15 on the supporting structure 1, thescrew d6 being threaded into a lug 47 on the yoke 43.

Projecting downwardly from the bearing 1 manner, for instance by theshaft 7, the pulleys 6 and 4 and the belt 5, the PllllOIl 8 will 32 inwhich the shaft 31 is journaled isan arm 48 having a slot 49. Fixed tothe supporting structure 1 is a bracket 50 upon which is pivoted, asindicated at 51, a link 52 having a slot A pivot element is held by awing nut 55 or any other suitable means in the slot 53 of the link 52and one end of the pivot element 5% travels in the slot 19 of the arm18. Pivoted to the link 52 is a pawl 56 adapted to engage a ratchetwheel 57 constituting 'a part of the shaft 58 journaled in a bearing 59.Attached to the outer end of the shaft 58 is a beveled pinion 60 meshinginto a beveled pinion 61 formed at the upper end of a sleeve 62, thesleeve being provided with a key or feather 63, and being journaledforrotation in a'bearing 64 mounted on one end of the supporting structure1.

Mounted to reciprocate in the sleeve 62 is a drill rod 65, provided witha keyway 66 which engages the key 63. The upper end of the drill rod 65is journaled for rotation in a head 67, but is held against longitudinalmovement therein, the head 67 constituting a part of an arm '68 havingan extension 69 slidably received in a guide 70 constituting a part ofthe supporting structure 1.

Threaded into the shaft 58 is a set screw 72 engaging one end of themotor or engine shaft 7 the same extending into the shaft 58. A. lever73 is fulcrumed upon the supporting structure 1, the lever 73 beingoperatively connected with a sleeve 7 1 splined onto. the shaft 58, thesleeve 74: being equipped at its ends with beveled pinions 75. Thebeveled pinions 75 on the sleeve 7 1 are adapted to engage, one at atime,'with a beveled pinion 7 6 secured to the lower end of an uprightshaft 77 journaled for rotation infa frame 78 carried by the supportingstructure 1,the shaft 77 being equipped at its upper end with a pinion79 which rests on top of the frame 7 8.

The-invention further includes an annular casing 80 which may be placedabout and removed from the drill rod 65, the casing 80 58 may rotateindependently of the shaft 7,

and the sleeve 7 1 is shifted to an intermediate position by means ofthe lever 73 or its equivalent, so that the sleeve 7 1 is not coupled upby means of either of the pin- 7 ions 75 with the pinion 76 and theshaft 78.

When the shaft 3 is rotated in any suitable drive the pinion 9 andimpart rotary movement to the shaft 1 1 through the stub shaft 1.0, thefacing 37 on the wheel 20 being held in engagement with one side of thedrill rod 65. From the gear wheel 9 motion will bejtransmitted'to thegear wheel 27 and from the gear wheel 27 to the shaft 31 through themedium of the stub shaft 28.

The cams 38 may be so set thatwhen the shaft 31 is rotated, the cams,engaging the roller 40, will, throughout a portion of the rotation ofthe shaft 31, move the forward end of the shaft 31 to the right in Fig.1 and hold the facing 37 on the wheel 36 engaged with one side ofthedrill rod 65. It will now be understood that when the wheels 20 and36 are rotated, the same, bearing against opposite sides of the drillrod 65 and rotating in opposite directions, will effeet a raising ofthedrill rod. So soon, however, as the shoulder 39 on one of the cams 38rides off the roller 42, the spring 34 will react upon the bearing'32and swing the shaft 31 laterally, the wheel 36 being drawn away from thedrill rod 65. Then, the drill rod will drop under its own weight.Especial attention is directed to the fact that by the Constructionabove described,

there is a minimum amount of lost motion in shoulders 39 of therespective cams may be adjusted, thus varying the amount of drop in thedrill rod 65. Secondly, the cams 38 may be so set and held with respectto each other that they will form a continuous, circular wheel. Whenthis operation is brought about, the cams in the form of a wheel willremain in abutment with the roller -12, and thus the wheel 36 will. beheld continuously engaged with the drill rod 65. Therefore, the drillrod 65 may be elevated to any desired extent and a string of drill toolsmay be lifted out of a boring. Passing now to the mechanism whereby anintermittent rotary movement is imparted to the drill rod 65 it will beunderstood that when the bearing 32 is moved in the manner abovedescribed by the coaction between the cam 38 and the roller 4-2, thedepending arm 48 which constitutes a partofthe hearings will bereciprocated transversely of the machine; The pivot element 54: which isadjustably fixed in the link 52 will travel up anddown in the slot 4L9of the arm 48 and thus the pawl 56 will be actuated, the pawlengagingthe ratchet wheel 57, thus imparting rotation to the shaft 58, thebeveled pinion 60 of which, meshing into the beveled pinion '61 willrotate the sleeve 62, an intermittent rotary movement being imparted tothe drill rod 65 through the engagement between the key 63 on the sleeveand the keyway 66 in the drill rod; Thus, a reciprocating movement willbe imparted to the drill rod 65 and, atthe same time, the drill rod willbe given astep-by-step rotary movement. The throw of the pawl 56 may beregulated by shifting the pivot element 54 in the slot 53 of the linkLet it be supposed that, having proceededto a predetermined depth byimparting a reciprocating movementto the drill rod 65, it is desired tobore farther, by imparting a rotary movement to the drill rod. Undersuch circumstances, by manipulating the screw 17 or its equivalent, theshaft 14 may be swung laterally, thus disengaging the wheel 20 from thedrill rod 65. By giving a partial rotation to the shaft 31, the cams 38may be so positioned with respect to the roller 42 that, under theaction of the spring 3%, the shaft 31 and the wheel 36 will be swunglaterally away from the drill rod 65. The drill rod, therefore, is freeto rotate. The shaft 58 is then coupled up with the engine shaft 7 bymeans of the set screw 72 and when the shaft 7 is rotated, continuousrotary-movement will be imparted to the shaft 58, rotary movement beingimparted to the sleeve 62 and the drill rod 65 through the medium of theintermeshing pinions 60 and 61." During this operation, the ratchetwheel 57 willclick over the pawl 56 or, if desired, the pawl 56 may beswung backwardly outof engagement with the ratchet wheel.

The drill rod 65, as is well known is commonly fashioned in a pluralityof sections which are threaded together at their meeting ends and attimes it'i's desirable to separate one section of the drill rod fromanother section thereof. With this end in view, the shafts 31 and 14 areso manipulated that the wheels 20 and 36will grip and hold againstrotation, a lower section of the drill rod. Then, the casing is mountedupon an upper section of the drill rod, the pawl I 83 being engaged inthe keyway 66 in the upper section of the drill rod and 'the gear wheel82' which is carried by the casing be ing engaged with the pinion 79 onthe upper I end of the shaft 78. The pawl 56 may be disengaged from theratchet wheel 57 and through the medium of the lever 73 the sleeve 74may be shifted longitudinally on the shaft 58 to couple up either of thebeveled pinions 75 with the beveled pinion 7 6 on the lower end of theshaft 77, it thus being possible to rotate the upper section of a thedrill rod 65 in one direction or the other,

through the medium of the shaft 7 and the set screws 72, for the purposeof screwing together or uncoupling, a pair of sections of the drill rod.The pinion 61, the sleeve 62 and the bearing 64 may serve as asuflicient. support, opposed to the wheel 36, and therefore, the wheel20 may be dispensed with.

Having thus described the invention, what is claimedisz 1. In a deviceof the class described, a reciprocating drill; and circular elementsengaging opposite sides of the drill, one circular element being powerdriven and one circular element being retractable from the drill; andmeans for retracting the retractable element from the drill.- Y 2. Innadevice of the class described, a

reciprocating drill; a laterally movable shaft havin rotary means forengaging one side of the drill thereby to move the drill in thedirection of its length; and mechanism for actuating the shaft laterallyto move said means away from the drill.

3. In a device of the class described, a reciprocating drill; alaterally movable shaft having rotary means for engaging one side of thedrill thereby to. move the drill in the direction of its length; a camon the shaft; and an abutment with which the cam cooperates.

a. In a device of the class described, a reciprocating drill; alaterally movable shaft having rotary means for engaging one side of thedrill thereby to move the drill in the direction of its length;yieldable means for moving the shaft laterally; a cam on the shaft; andan abutment with which the cam engages.

5. In a device ofthe class, described, a reciprocating drill; alaterally movable shaft having rotary means for engaging one side of thedrill thereby to move the drill in the direction of its length; a cam onthe shaft; a, movable abutment with which the cam engages; and means forholding the abutment in adjusted positions.

6. In a device of the class described, a reciprocating drill; alaterally movable shaft having rotary means for engaging one side of thedrill thereby to move the drill in the direction of its length; a cam onthe shaft; a movable abutment; means for holding the abutment inadjusted positions; and a yieldable means for moving the shaftlaterally.

7. In a device of the class described, a reciprocating drill; alaterally movable shaft having rotary means for engaging one side of thedrill, thereby to move the drill in the direction of its length; a pairof cams on the shaft; and an abutment with which the cams engage; thecams being circumferentially adjustable with respect to each other tovary the drop of the drill.

8. In a device of the class described, a reciprocating drill; alaterally movable shaft having rotary means for engaging one side of thedrill thereby to move the drill in the direction of its length; camscircumferentially adjustable upon the shaft, theperiphcries of the camscooperating to form a circle when the cams are adjustedcircumferentially; an abutment with which the cams engage; and means forholding the cams against relative circumferential movement and with theperipheries of the cams cooperating to form a circle.

9. In a device of the class described, a supporting structure; a ratchetwheel carried thereby; a drill mounted to reciprocate upon thesupporting structure; means for operatively connecting the ratchet wheelwith thedrill; a bearing slidable upon the supporting structure; a pawloperatively connected with the bearing and engaging the ratchet wheel; ashaft journaled in the bearing and provided with rotary means forengaging one side of the drill thereby to raise the drill; a cam uponthe shaft; and an abutment engaging the cam.

10. In a device of the class described, a supporting structure; a drillmounted vto reciprocate therein; a bearing slidable upon the supportingstructure; a laterally movable shaft journaled in the bearing and havingrotary means for engaging one side of the drill thereby to raise thedrill; means for moving the bearing to retract the rotary means from thedrill; a pawl operatively connected with the bearing; a second shaftmounted for rotation on the supporting structure; a ratchet wheel on thesecond shaft and engageable by the pawl; means for operativelyconnecting the second shaft with the drill; and means for independentlyrotating the second shaft.

p 11. In a device of the class described, a supporting structure; adrill mounted to reciprocate therein and comprising sections; a pair ofrotary elements engaging opposite sides of the drill, one rotary elementbeing power driven and one rotary element being laterally movable; meansfor holding the rotary elements engaged with one section of the drillwhen the power driven rotary element is at rest; rotary means engaginganother section of the drill; and mechanism upon the supportingstructure for operating said rotary means to effect a separation of thesections of the drill.

12. In a device of the class described, a supporting structure; a drillmounted therein and comprising sections, the drill having a keyway; acasing removably mounted upon one section of the drill; means forholding another section of the drill against rotation; a gear wheeljournaled in the casing and havinga pawl engaging the keyway; means forsupporting the casing; a shafthaving a pinion meshing into the gearwheel;

and means for driving the shaft.

13. In a device of the class described, a supporting structure; a pairof shafts journaled thereon, one shaft being laterally movable;intermeshing pinions on the shafts;

means for driving one shaft; a bearing slidable on the supportingstructure, in which the laterally movable shaft is journaled; a cam onthe laterally movable shaft; an abutment movable upon the supportingstructure and cooperating with the cam; means for holding the abutment1n ad usted positions; a spring connecting the bearing with thesupporting structureand constitutmg means for securing a cooperationbetween the cam and the abutment; a drill mounted to reciprocate on thesupporting structure and to rotate thereon; wheels on the shafts andengaging opposite sides of the drill; a ratchet Wheel mounted for rotamyown, I have hereto aflixed my signature tion on the supportingstructure; a pawl in the presence of two witnesses.

operativel connected with the bearing and cotiperatii g with the ratchetwheel; and JEREMIAH MORROW' 5 means for connecting the ratchet wheel op-Witnesses:

eratively with the drill. C. E. LITTLE,

In testimony that I claim the foregoing as V. G. MELVIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latents Washington, D. G.

